If you want to know everything about this story and why there is a Robin Williams tribute in World of Warcraft, you should read the previous article about this.
Everyone start speculate what Blizzard is going to add to the game to honour this great actor. Wowhead datamined not one, but three NPCs related to Robin Williams: a djin (Robin), a human male (Robin) and a human female (Robin). Yes, all three are named robin the entertainer. Most likely the djin is the Genie from Aladdin, the human male can be Mork from Mork & Mindy, and the human female may be Mrs. Doubtfire.
We know nothing else about these NPCs other than they are going to be added during Warlords of Draenor. We have no idea what’s their behaviour will be or what they are going to be used for, but we now know for sure Blizzard kept their promise and added something to World of Warcraft to honour Robin Williams.